What version of the binding are you running? As Iāve said a number of times above, this needs to use a new binding, and if you are really only using 2.3, which is quite old, this is not supported!
It seems that I have the same issue in OH3 (3.1.0). I have a Multi Sensor Aeotec ZW100 That I want to associate with a Fibaro FGS224 at endpoint 2. But I canāt see endpoints, but only node.